PAGER - onePAGER Information

PAGER provides shaking and loss estimates following significant earthquakes
anywhere in the world. These estimates are generally available within 30
minutes and are updated as more information becomes available. Rapid estimates
include the number of people and names of cities exposed to each shaking
intensity level as well as the likely ranges of fatalities and economic losses.
PAGER does not consider secondary effects such as landslides, liquefaction,
and tsunami in loss estimates at this time. For tsunami warnings see
http://tsunami.noaa.gov/

Information on the extent of shaking will be uncertain in the minutes and
hours following an earthquake and typically improves as additional sensor data
and reported intensities are acquired and incorporated into models of the
earthquake’s source. Users of PAGER need to account for uncertainty and
always seek the most current PAGER release for any earthquake.

Summary of the basic earthquake
parameters, including origin time, local time, magnitude,
hypocenter, and the name of the region where the earthquake took
place. For events with high likelihood of a tsunami, a link to the
NOAA tsunami Web page is provided (bold red text).

Earthquake Impact Scale summary alert level
. The higher of the two alert levels (D) is
shown as the summary alert at the top-center of the page.

The version of the PAGER alert and the time the
alert was created. New versions of the alert are generated when
the earthquake information is improved as supplemental ground-shaking
constraints become available.

Earthquake Impact Scale alert levels
for fatalities (left) and economic losses (right). The alert levels are
based on the range of most likely losses; the uncertainty in the alert
level can be gauged by the histogram, depicting the percent likelihood
that adjacent alert levels (or fatality/loss ranges) occur. Accompanying
text clarifies the nature of the alert based on experience from past
earthquakes. If the economic alert is yellow or greater, the text will
also give a range of economic losses in terms of the country's Gross
Domestic Product. The higher level of the two alerts is shown as the
summary alert at the top-center of the page (B).

Table showing population exposed to
different Modified Mercalli Intensity (MMI) levels and the possible
damage at different intensity levels for resistant and vulnerable
structures. MMI describes the severity of an earthquake in terms of its
effect on humans and structures and is a rough measure of the amount of
shaking at a given location. Unlike earthquake magnitude, intensity
varies with distance from the fault. Population outside the map bounds
are not included in the totals.

Map of MMI contours plotted over the
Landscan (Oak Ridge National Laboratory) population base map. The
regions labeled with Roman numeral MMI values are separated by half
intensity unit contour lines, e.g., 5.5, 6.5, 7.5. The total population
exposure to a given MMI value is obtained by summing the population
between the thick contour lines. This total is shown in the population
exposure table (E).

Region-specific structure and earthquake
commentary. The Structures comment may contain the most
vulnerable building type(s) in the region or a general description of
the vulnerability of the buildings in the region. The Historical
Earthquakes section includes a table of population exposure and
fatalities for three previous nearby earthquakes and, in some cases, the
potential for fires, landslides, liquefaction, or other hazards, based
on past earthquakes in the region, will be noted.

Table of MMI estimates for selected
settlements. A maximum of 11 settlements that fall within the
map boundary are included in the table. The table contains country
capitals and the six settlements with the highest estimated intensity.
The remaining settlements listed are selected by population. Settlement
name, location and population are obtained from the freely-available
GeoNames geographical database.

Footer, including a link to the PAGER
web page, event identification information, and a disclaimer noting that
the content was automatically generated, and has additional sources of
uncertainty. All possible uncertainties are not considered in the
determination of estimated earthquake fatalities and economic losses;
the actual impact of the earthquake may differ from PAGER's
automatically generated estimate.